21120101222153 has 2 divisors, whose sum is σ = 21120101222154. Its totient is φ = 21120101222152.

The previous prime is 21120101222119. The next prime is 21120101222189. The reversal of 21120101222153 is 35122210102112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17265130247689 + 3854970974464 = 4155133^2 + 1963408^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120101222153 - 2¹⁸ = 21120100960009 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120101222113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560050611076 + 10560050611077.

It is an arithmetic number, because the mean of its divisors is an integer number (10560050611077).

Almost surely, 2^{21120101222153} is an apocalyptic number.

It is an amenable number.

21120101222153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120101222153 is an equidigital number, since it uses as much as digits as its factorization.

21120101222153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 21120101222153 its reverse (35122210102112), we get a palindrome (56242311324265).

The spelling of 21120101222153 in words is "twenty-one trillion, one hundred twenty billion, one hundred one million, two hundred twenty-two thousand, one hundred fifty-three".